Supporting frame



FIG. 1 is a perspective view of a supporting frame showing the claimed design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is another perspective view showing the supporting frame in an extended configuration;

FIG. 10 is another perspective view showing the supporting frame in a folded configuration;

FIG. 11 is an enlarged view of portion 11 shown in FIG. 1 ;

FIG. 12 is another enlarged view of portion 12 shown in FIG. 2 ; and,

FIG. 13 is another perspective view showing the supporting frame for use with a microphone and a clamp.

The broken lines seen in FIGS. 1, 2, 11 and 12 demarcate enlarged views. The broken lines seen in FIG. 13 depicting a microphone and a clamp are for environmental purposes. All broken lines form no part of the claimed design. 

CLAIM The ornamental design for a supporting frame, as shown and described. 